What are the advantages and disadvantages of using filter_input() over ctype_digit() for input validation in PHP?

When validating user input in PHP, using filter_input() provides a more comprehensive approach as it allows for specific filtering and validation options, while ctype_digit() simply checks if a string contains only digits. However, filter_input() requires more parameters and can be more complex to use compared to the simple ctype_digit() function. 

// Using filter_input() for input validation
$input = filter_input(INPUT_POST, 'input_field', FILTER_VALIDATE_INT);

if($input !== false){
    // Input is a valid integer
} else {
    // Input is not a valid integer
}

Keywords

filter_input ctype_digit input validation advantages disadvantages

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